BIZARRE BEHAVIOUR: Shia headbutted a man in a pub in New Cross [WENN/ALAMY]

The 27-year-old actor has issued a bizarre rambling apology after he was caught on camera headbutting a drinker in the Hobgoblin pub in New Cross, South London.

Sitting in the beer garden with a group of newly-found friends, Shia is heard saying: "I'm not trying to have any more problems, I'm trying to make peace… I'm a normal human being, I accept what I gotta get into to do what I love. And I'm not trying to s*** on nobody. I'm a human being, I'm super normal, more normal than most.

He added: "When people wanna get hostile, and s*** on my girl's mom, and say things that are out of turn..." before trailing off and rolling a cigarette.

Shia is seemingly attempting to redeem himself with a group of Brits who seen him trying to start a brawl with a fellow drinker in the bar.

In a video acquired by TMZ, the Transformers star is seen in the New Cross local shouting at a man who is sitting at a table.

Shia, who is wearing a white baseball cap, repeatedly shouts: "What did you say?" into the man's ear, before leaning forwards to headbutt him.

SCENE OF THE CRIME: Shia has now brawled twice at this New Cross local [ALAMY]

“What are you saying about my girl's mom? Are you f****** kidding me bro?”

Shia La Beouf

The troubled actor then continues screaming: "What are you saying about my girl's mom? Are you f****** kidding me bro?"

A female companion is heard yelling out the star's name as she attempts to pull him away from the bald man who allegedly insulted his girlfriend Mia Goth's mother.

The Daily Star Online contacted the Met Police regarding the incident, but the bureau had no knowledge of the fight being reported.

However, the actor seemed quite remorseful of his actions in the slurred apology, also captured by TMZ.

Shia met girlfriend Mia on the set of his new film Nymphomaniac, and the beauty's mother lives near the Hobgoblin.

While a Hollywood star having a brawl in a South London pub may seem like a once in a lifetime occurrence, Shia has actually got into fisticuffs at the exact same bar before.

In November 2012, the Disturbia actor got into a fight with a man who stole his hat.

FALLEN FROM GRACE: Shia had great success with Transformers and Indiana Jones [WENN]

MELTDOWN: Shia announced that he was retiring from public life [TWITTER]

And Shia apparently has a bit of a habit of getting into boozy bust-ups. The star was filmed being punched in the head by a shirtless man outside a bar in Vancouver, Canada in 2011; while earlier in the year he fought with a drinker in LA after he used a gay slur against him.

Shia has had a questionable few months in Hollywood after he was accused of plagiarism by comic book artist Daniel Clowes.

The actor oddly hired a skywriter to write an apologetic message aimed at Clowes, and sent out numerous tweets.

But he really flipped his lid when Jim Carrey mocked his bizarre behaviour at the Golden Globes – and sent out some (now deleted) tweets questioning the comedian's parenting skills.

Shia, who used to date Carey Mulligan, then announced that he was quitting Twitter and retiring from public life, stating "I am not famous anymore".

He has been in the public eye since he was a child, after starring in the Disney hit show Even Stevens, as well as the movie Holes.

Since his squeaky clean start, he gained Hollywood stardom in the Transformers saga, as well as scoring a part in the latest Indiana Jones installment.

But with his behaviour getting increasingly bizarre, we wonder if he can dodge the limelight for long.